mica capacitors!

[Guest]

Archived from groups: rec.audio.tech (More info?)

I can't buy silvered mica capacitors in south africa. they cost more
than output transistors. What can I use as substitutes for it? I need
390pF, 180pF, 47pF, 10pF caps.

I need to use it in the leach amplifier.

 

[Guest]

Archived from groups: rec.audio.tech (More info?)

johanwagener@webmail.co.za (Johan Wagener) wrote in
news:c86a2c09.0405041148.4631d6cb@posting.google.com:

> I can't buy silvered mica capacitors in south africa. they
> cost more than output transistors. What can I use as
> substitutes for it? I need 390pF, 180pF, 47pF, 10pF caps.
>
> I need to use it in the leach amplifier.
>

http/www.geocities.com/audiograde/filmcaps.html

Really small value caps in polystyrene or other films
aren't easy to come by, but the above source may be able
to help you.

There are certain ceramic types that may be suitable,
but I can't recall the name offhand. Use the best quality
parts you can find for the feedback circuit components.

--Damon

 

[gregs]

Archived from groups: rec.audio.tech (More info?)

In article <Xns94E1C85FCDF2Ddamonhalcyoncom@216.196.97.136>, Damon Hill <damon16ONE@attbi.dotcomma> wrote:
>johanwagener@webmail.co.za (Johan Wagener) wrote in
>news:c86a2c09.0405041148.4631d6cb@posting.google.com:
>
>> I can't buy silvered mica capacitors in south africa. they
>> cost more than output transistors. What can I use as
>> substitutes for it? I need 390pF, 180pF, 47pF, 10pF caps.
>>
>> I need to use it in the leach amplifier.
>>
>
>http/www.geocities.com/audiograde/filmcaps.html
>
>Really small value caps in polystyrene or other films
>aren't easy to come by, but the above source may be able
>to help you.
>
>There are certain ceramic types that may be suitable,
>but I can't recall the name offhand. Use the best quality
>parts you can find for the feedback circuit components.
>
>--Damon

NPO

 

[john]

Archived from groups: rec.audio.tech (More info?)

Use high precision low "K" ceramic capacitors. COGO is the correct
indentifier. Use the highest voltage rating available too. Avoid the
plastic (polyester, etc. ) capacitors.

John

Johan Wagener wrote:

> I can't buy silvered mica capacitors in south africa. they cost more
> than output transistors. What can I use as substitutes for it? I need
> 390pF, 180pF, 47pF, 10pF caps.
>
> I need to use it in the leach amplifier.